Internal error
[Zfjs4IvrhxO65IdjjsAzvwAAABQ] /wiki/index.php?title=Teaching_and_Learning_Resources Error: Call to a member function getFullText() on null
Backtrace:
from /home/sites/9b/9/973db20736/public_html/wiki/extensions/BedellPenDragon/BedellPenDragon.classes.php(247)
#0 /home/sites/9b/9/973db20736/public_html/wiki/includes/parser/Parser.php(3971): BedellPenDragon::renderRandomPageInCat(NULL, array, Parser, PPFrame_Hash)
#1 /home/sites/9b/9/973db20736/public_html/wiki/includes/parser/PPFrame_Hash.php(341): Parser->extensionSubstitution(array, PPFrame_Hash)
#2 /home/sites/9b/9/973db20736/public_html/wiki/includes/parser/Parser.php(2879): PPFrame_Hash->expand(PPNode_Hash_Tree, integer)
#3 /home/sites/9b/9/973db20736/public_html/wiki/includes/parser/Parser.php(1549): Parser->replaceVariables(string)
#4 /home/sites/9b/9/973db20736/public_html/wiki/includes/parser/Parser.php(639): Parser->internalParse(string)
#5 /home/sites/9b/9/973db20736/public_html/wiki/includes/content/WikitextContent.php(375): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#6 /home/sites/9b/9/973db20736/public_html/wiki/includes/content/AbstractContent.php(591): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#7 /home/sites/9b/9/973db20736/public_html/wiki/includes/Revision/RenderedRevision.php(263): AbstractContent->getParserOutput(Title, integer, ParserOptions, boolean)
#8 /home/sites/9b/9/973db20736/public_html/wiki/includes/Revision/RenderedRevision.php(235): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(WikitextContent, boolean)
#9 /home/sites/9b/9/973db20736/public_html/wiki/includes/Revision/RevisionRenderer.php(217): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#10 /home/sites/9b/9/973db20736/public_html/wiki/includes/Revision/RevisionRenderer.php(154): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#11 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#12 /home/sites/9b/9/973db20736/public_html/wiki/includes/Revision/RenderedRevision.php(197): call_user_func(Closure, MediaWiki\Revision\RenderedRevision, array)
#13 /home/sites/9b/9/973db20736/public_html/wiki/includes/poolcounter/PoolWorkArticleView.php(137): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#14 /home/sites/9b/9/973db20736/public_html/wiki/includes/poolcounter/PoolCounterWork.php(162): PoolWorkArticleView->doWork()
#15 /home/sites/9b/9/973db20736/public_html/wiki/includes/page/ParserOutputAccess.php(281): PoolCounterWork->execute()
#16 /home/sites/9b/9/973db20736/public_html/wiki/includes/page/Article.php(746): MediaWiki\Page\ParserOutputAccess->getParserOutput(WikiPage, ParserOptions, MediaWiki\Revision\RevisionStoreRecord, integer)
#17 /home/sites/9b/9/973db20736/public_html/wiki/includes/page/Article.php(561): Article->generateContentOutput(User, ParserOptions, integer, OutputPage, array)
#18 /home/sites/9b/9/973db20736/public_html/wiki/includes/actions/ViewAction.php(74): Article->view()
#19 /home/sites/9b/9/973db20736/public_html/wiki/includes/MediaWiki.php(531): ViewAction->show()
#20 /home/sites/9b/9/973db20736/public_html/wiki/includes/MediaWiki.php(315): MediaWiki->performAction(Article, Title)
#21 /home/sites/9b/9/973db20736/public_html/wiki/includes/MediaWiki.php(913): MediaWiki->performRequest()
#22 /home/sites/9b/9/973db20736/public_html/wiki/includes/MediaWiki.php(546): MediaWiki->main()
#23 /home/sites/9b/9/973db20736/public_html/wiki/index.php(53): MediaWiki->run()
#24 /home/sites/9b/9/973db20736/public_html/wiki/index.php(46): wfIndexMain()
#25 {main}